<!DOCTYPE html>
<html lang="ch">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
</html>
<script>
    var socre=+prompt("请输入成绩");
    if(socre==100){
        var str1="奖励遥控车"
      
    }
    if(socre<100){
        var str1 ="奖励mp4"
        
    }
    if(socre<90){
        var str1 ="奖励参考书"
        
    }
    if(socre<60){
        var str1="揍你"
        
    }
    console.log(str1);
</script>